For devices advertising themselves as HID, I think everything will go
fine at the driver side if done right. The good way is to have a single,
generic HID driver, handling tablets, mouses, joysticks, keyboards,
anything else, in the same driver. This way, a weird device may have
some keyboard buttons, some knobs and some mouse axis, and still work
out of the box.
The problem is then mapping all this to input_server events. We want
mouse to move te pointer on screen, and keyboard to type letters. But
what to do with strange devices that are neither keyboard or mouse ?
Where to send the input then ?
